How to sort an array of arrays by a certain element?

Question

Python

There is an array:

How to sort it so that in the end it will be in the form:

[[1, '...', '...'], [2, '...', '...'], [3, '...', '...'], [4, '...', '...']]

There is already a solution, but I'm sure it's not the most optimal, and the script usually works with large data, so the difference will be noticeable.
My head doesn’t boil at all now, I was looking for a bug for an hour and a half, as it turned out, set () changes the order of elements ...

Answer 1

Look at the key parameter of the sort and sorted builtin functions. They are made primarily to solve your problem.